Physics – High Energy Physics – High Energy Physics - Phenomenology
Scientific paper
1993-08-04
Phys.Rev.D49:3721-3733,1994
Physics
High Energy Physics
High Energy Physics - Phenomenology
(32 pages LATEX) [DOE-ER\,40757-022, CPP-93-22] {Small changes made and two references added. This version will appear in Phys
Scientific paper
10.1103/PhysRevD.49.3721
In unification models based on SU(15) or SU(16), baryon number is part of the gauge symmetry, broken spontaneously. In such models, we discuss various scenarios of important baryon number violating processes like proton decay and neutron-antineutron oscillation. Our analysis depends on the effective operator method, and covers many variations of symmetry breaking, including different intermediate groups and different Higgs boson content. We discuss processes mediated by gauge bosons and Higgs bosons parallely. We show how accidental global or discrete symmetries present in the full gauge invariant Lagrangian restrict baryon number violating processes in these models. In all cases, we find that baryon number violating interactions are sufficiently suppressed to allow grand unification at energies much lower than the usual $10^{16}$ GeV.
Pal Palash B.
Sarkar Utpal
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